CA446334A - Door lifting mechanism - Google Patents

Door lifting mechanism

Info

Publication number
CA446334A
CA446334A CA446334A CA446334DA CA446334A CA 446334 A CA446334 A CA 446334A CA 446334 A CA446334 A CA 446334A CA 446334D A CA446334D A CA 446334DA CA 446334 A CA446334 A CA 446334A
Authority
CA
Canada
Prior art keywords
lifting mechanism
door lifting
door
lifting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA446334A
Other languages
French (fr)
Inventor
Madland Thorvald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Youngstown Steel Door Co
Original Assignee
Youngstown Steel Door Co
Publication date
Application granted granted Critical
Publication of CA446334A publication Critical patent/CA446334A/en
Expired legal-status Critical Current

Links

CA446334A Door lifting mechanism Expired CA446334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA446334T

Publications (1)

Publication Number Publication Date
CA446334A true CA446334A (en) 1948-01-20

Family

ID=35564008

Family Applications (1)

Application Number Title Priority Date Filing Date
CA446334A Expired CA446334A (en) Door lifting mechanism

Country Status (1)

Country Link
CA (1) CA446334A (en)

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